(music) The use of multiple keys in the same composition, especially by multiple instruments at the same time

Having several tones. / Of or using the Greek system of diacritics which employs the rough and smooth breathings and the grave, acute, and circumflex accents. Replaced by the monotonic system in 1982.

(music) That uses two or more tonalities simultaneously.

In a polytonal way.

plural of polytonality

The quality of being polytonic.

A polyphonic ringtone

plural of polytone

plural of polyton

(mathematics) An ordered set of singletons